msem-instigator

Reach
If a creature is attacking you and you control a Centaur, you may cast Qilan Archer without paying its mana cost and as though it had flash.

Menace

Vision (Whenever this or another creature you control enters, reveal the top card of your library. Then you may put that card into your graveyard.)
Whenever Qilan Seer envisions a creature card, it gets +4/+0 until end of turn.

Haste
When Qilan Stormers enters, it gets +X/+0 until end of turn, where X is the number of creatures you control.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Trample

Trample
Qiyan enters with twice X +1/+1 counters on them.
If damage would be dealt to Qiyan while they have a +1/+1 counter on them, prevent that damage, remove that many +1/+1 counters from Qiyan, then create a 0/0 green Hydra creature token and put twice that many +1/+1 counters on it.

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Vigilance, reach, trample
{4}{G}{G}, Exile Qiyan, Serpent of Seven Heads from your graveyard: Create seven 1/1 green Snake creature tokens. Activate only as a sorcery.

Trample
Whenever Quakestep Behemoth or another creature you control enters, put X +1/+1 counters on each creature you control, where X is the entering creature's power.

Whenever you cast an instant or sorcery spell, you may conjure two duplicates of it into your main library, then shuffle. Then if there are two or more cards in your graveyard that share a name with that spell, copy it. You may choose new targets for the copy.

Exile twice X cards from the top of your library. During your next turn, you may play cards exiled this way.

Whenever you tap a land for mana, add an additional one mana of any color.
{8}{G}{G}: Creatures you control get +2/+2 and gain trample until end of turn.

Enchant creature
When Queenscoming Feast enters, draw a card.
Whenever enchanted creature attacks, create a 1/1 white Peasant creature token.

Haste (This creature can attack and {T} as soon as it comes under your control.)
Quick Brown Fox can't be blocked by Hounds.

Equipped creature gets +2/+0.
Equipped creature has first strike as long as it's attacking.
Equip {2}

{T}: Quill Sniper deals 1 damage to any target if it's an opponent or if you control a storied permanent. (Enchantments and legendary permanents are storied.)

{T}: Add {C}.
{T}, Exile two cards from your graveyard: Add {G} or {U}.

When R-12 Lone Digger enters, it deals 3 damage to target player or planeswalker.

Put a +1/+1 counter on each creature you control that entered this turn. (Then exile this card. You may cast the creature later from exile.)

Creatures you control get +2/+0.
Whenever a creature you control is dealt damage, it deals that much damage to you.

Enchant opponent
Whenever enchanted player is attacked, choose an attacking creature. Create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the next end step.

Choose one —
• Radiant Outburst deals 3 damage to target creature.
• Harmonize twice. (To harmonize, trigger up to one harmony of a permanent you control.)

{T}: Add {R} or {W}. You lose 1 life unless you have less life than an opponent.

Radiant Vistas enters tapped.
{T}: Add {W} or {U}.
{W}{U}, {T}, Sacrifice Radiant Vistas: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)